Potential starter attachment.



H. W. CHENEY.

POTENTIAL STARTER ATTACHMENT.

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H. W. CHENEY.

POTENTIAL STARTER ATTAGHMENT- APPLIOATION FILED SEPT.29.1906. 909,367.

Muon/VM" warme/WY 018K. @A w05 15 wards from a running to a starting- 26 is necessa 'UNITED STATES PATENT OFFICE.

HERBERT W. CHENEY, OF NORWOOD, OHIO, ASSIGNOR TO ALLIS-CHALMERS COMPANY, A CORPORATION OF NEW JERSEY, AND THE BULLOCK ELECTRIC MANUFACTURING COM- PANY, A CORPORATION OF OHIO.

POTENTIAL STARTER ATTACHMENT.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application led september 29, 1906. Burial No. 886,757.

To all whom 'it may concern:

Be it known that I, HERBERT W. CHENEY; .a citizen of the United States, residing at Norwood, in the county oi Hamilton and State of Ohio, have invented certain new for starting devices for electric motors.

In operating starting devices for some types of motors, especially in potential starters for induction motors, it is often undesirable that the starter be moved back- 0- sition. To this end controllers have been ldi signed which move directly from the running position to the oif osition Without passing through a starting position. However, in order to prevent a careless or inexf perienced operator from moving the controller from a running to aJstartin position, or from an ofi position directI to a running position, some reventive evice and it is the o ject of my present invention to rovide such a reventive device which sha1 be. both simp e in construction and accurate in operation.

Other objects of my invention will appear 80 hereinafter.

, To this end ni invention in one of its as pects comprises the combination of aoontrol er, a handle therefor, a latch mounted on 4said handle, and a xed plate coacting with `said latch. to prevent backward movement of the handle into certain positions. l In a somewhat different aspect my invention comprises the combination of a rotatable drum, operating means therefor, a pawl co erating with a notchedplate to revent A bac Ward movement of the controler for certain positions, said pawl being manually,

movable independently of the controller.

Other features of my invention will a pear from the following descri tion and c aims taken in connection with t e accompanying drawings.

Figure 1 is a partial sectional elevation of the up er part of a controller embod one form o my invention. Fig. 2 is a view similar to Fig. 1 but showing' the pawl in another position. Fi 3 is a artial plan view of the controller of ig- 1. wi the operating handle removed. Fig. 4 is a development of the notched ring of the controller of Fig. 1'. Fig. 5 is a partly sectional sideelevation of a controller embodying anotherforin of my invention. Fi 6 is a partial front elevation of the contro lerrof Fig. 5. Fig. 7 is an enlarged side elevation, partly in section, of the controller operating means; end Fig. 8 is a developmentl of the notched ring shown in Iieferring first to the modification shown in Figs. 1 to 4 inclusive, i10 is the controller casing surmounted by a cap plate 1 1 Within the casing 10 may bcy. controller drum of any desired. construction though the operating mechanism. here shown is especially designed for a. controller drum hrlng dupli cate halves which each cowact with one of the two sets of contact fingcraduring one complete operation of the controller, and with the other set duringl the nxtcomplete operation thereof. Suc OQBIQllQn has. duplicate off,` Star f und funmng positions as indicated infig. 3. The con; troller here shown passes though two starting positions between the off the running positions, though any de; sired number of starting positions may be used. Iii the arrangement shown analogous positions are 180 apart- 'lho particular construction and arr ement of the cone troller drain, however, omis no 4art of my le to controllers having but one o and one runnin position with any desiree number of starting positions between them.

Extending upwardly from the cap plate 11 and preferably integral therewith isa i plate 12 having correspond to the oi,lrststarting, second starting" and running ositions res ectively of the controller. he contro er drumis mountedy on a shaft 17, on the upper end of which fits the operating handle movable by a knob 19 at its outer end. Pivoted beneath the handle 18 is. paw] 20 the inner end of whiph is n ol'm-.lly Pressed downwardly by a ring 21 into engagement with the upper su ace of the nng 12. -The inner end of awl 20, however, may be lifted by means o a push-button 22 in the knob pairs of notches 13 and 1,3, 14 and 1'4, 15 and 15 and 16 and 16",whi'ch 1 -end of the pawl 20.

19, said push-button having a downward extension 23 which normally engages the outer If desired there may be a spring 24 which normally holds the pushbutton 22 in its uppermost position.

The ring 12 is constructed so that between certain of the notches, as between 15 and 16, 16 and 13, 15 and 16, and 16 and 13, ratchet teeth are formed, while the surfaces between the remaining notches are flat; that is, all of the notches have that side toward the next position in a forward or clockwise direction of a certain height and the notches 14, 15, and 14 and 15 have both sides of such height, while the notches 13, 16, 13 and 16 have the side towards the next osition in a backward or anti-clockwise r irection of a greater height.

When the controller is in any operative position the spring 21 normally holds the pawl 20 in engagement with one of the notches 13 to 16. By depressing the push-button 22 Vthe inner end of pawl 2O may be raised, as

shown in full lines in Fig. 2, to clear both sides of the notches 14, 15, 14 and 15, and the forward side of the notches 13, 16, 13 and 16. The shoulder 25 within the knob 19 prevents too great a downward movement of the push-button. Although the pawl cannot be raised by the push-button to clear the high side of the notches 13, 16, 13 and 16, a forward movement of the controller causes the pawl to' be so raised, as show n in dotted lines in Fig. 2, by the cam action of the inclined surfaces approaching the notches 13, 16, 13 and 16, tuus allowing the handle to be moved between certain notches in a forward or clockwise direction While preventing it in a backward or anticlockwise direction. The push-button 22 being released as soon as a movement of rotation has begun, the pawl 20 drops upon the rin 12, and upon reaching tne next notch rops into it, thus interrupting the forward movement and accentuating and accurately determining the controller positions, as well as preventing backward movement of the controller from the off and running positions. From any starting position the controller may be moved in either direction, for it is sometimes desirable that the controller be moved from start-,- ing position directly to the off position without passing through the running position. This 1s permissible because both sides of the starting notches are low enough to allow the push-button 22 to raise the pawl 20 to clear them.

In Fig. 5 I have shown at 30 a cast metal supporting frame on which is mounted a sheet metal cover 31. This frame and cover form a casing which may inclose the transformer or transformers (not shown) of a potential starter. Suspended on the lower part the frame 30 is an oil tank 32 adapted to contain oil which will surround the controller drum shown at 33. This drum is mounted in downwardly extendin arms or projections 34 on the frame 30. The drum 33 1s driven through gears 37 and 38 from an operating shaft 36, loosely mounted in a bearing 39 also integral with the frame 30. Mounted on the outer end of the shaft 36 is an operating handle 35, which, as shown in Fig. 6, is secured at its center to the shaft and is provided with two' hand grips. The distance between the gear 37 and the handle 35 is slightly greater than the length of the bearing 39 so that there can be a slight loose play or lateral movement of the gear 37, shaft 36 and handle 35. A spring 40 normally maintains the said parts in their innermost position from which they can be moved outwardly by pulling out the handle 35 until the gear 37, spring 40 and bearing 39 are all in contact.

Integral with the frame 3() and surrounding the shaft 36 and bearing 39 is a ring 41. This ring is provided with three pairs of notches 42 and 42, 43 and 43, and 44 and 44, the notches of each pair being located diametrically opposite each other. These pairs of notches are adapted to be engaged by a sliding pawl or plunger 45, pressed by a spring 49 into engagement therewith. The p unger 45 is mounted in an extension 46 from handle 35. This extension also serves as a pointer to indicate the position of the controller, there being another extension 47 which also serves as a pointer although it 100 does not necessarily contain a springpressed plunger. '.lhe three pairs of notches above referred to indicate respectively the offf', starting, and running positions of the controller, there being shown in this l modification but one starting position between the off and the "running positions, instead of two as shown in Fig. 1. The surfaces between the "05 and starting positions are fiat, while those between the starting and running positions, and the running and off positions are inclined to form ratchet teeth as'in Fig. 1. By pulling out the handle 35, the lunger 45, the movement of which toward t e ring 41 is limited by a in 48, may be lifted clear of the low sides o the "off and running notches and of both sides of the starting notches, but cannot be lifted high enough to clear the high sides of the of and running notches 42, 44, 42 and 44. However, by means of' the inclined surfaces which approach these notches a forward movement of the controller raises the plunger 45 over these high side's and allows it 125 to drop into the notches.

The o eration of the arrangement here describe lis, much the same as that of Fig. 1, save that instead of depressing a, pushbutton, the handle 35 is moved bodily out- 130 ward when assing from one position to another, whi e the notches serve to accentuate the controller positions andto limit the direction of rotation from the off and the running positions to one direction of rotation.

Man modifications of the precise arra ement ere` shown and described may e made without departing from the spirit and scope of my invention, and in the following claims I aim to cover my invention broadly.

What I claim as new is 1. In combination, a controller, a handle therefor, a latch mounted on said handle, and a fixed late co-acting With said latch to prevent bacrward movement of the handle into certain ositions.

2. In com ination, a controller, a handle therefor, a spring-pressed pawl in said handle, and a notched plate with which said paw] cooperates to accentuate predetermined positions of the controller, certain of the notches of said late being so constructed as to revent ackward movement of the handle t erefrom.

3. Ina controller, a rotatable drum, a s ring-pressed pawl movable with said mm, fixed notched late with which .said paxil cooperates to etermine the controller positions, and means for lifting said pawl out of all of the notches of said notched late for forward movement of the controller ut out of less than all of them` for backward movement thereof.

4. In a controller, the combination with a rotatable contact-car ing member and an operating handle there or, of a fixed notched p ate tto-acting with a spring-pressed pawl in the handle to determine the controller ositions, notches of said notched plate being constructed to limit the motion of said contact-carrying member from the positions corres ondi'ng to said notches to one direction o rotation.

5. In a controller, the'combination with a rotatable drum and an operating handle therefor, of an interlocking device for lpermitting rotation of said drum in 'one direction from all ositions and for preventing rotation of sai drum in the other direction from certain predetermined positions, coinprisin a fixed notched and a awl mova le with the drum and normally eld in engagement with said ring.

6. In' a controller, a rotatable drum,.an operating handle therefor, a iixed notched ring and a pawl cooperating with said notched ring and normally in engagement therewith, said pawl being manually movable out of engagement with all of the notches of said ring for forward movement of the controller but out of eng ement with only some of them for backwar movement thereof.

.notched ring,

7. In a controller, fixed contacts, a rotatable member carrying movable contacts, an operating handle for the latter, a fixed and a manually-movable pawl normally engaging said notched ring, some of the notches of said ring having one side higher than the other for preventin backward movement of the handle there rom.

8. In a cont-roller, a rotatable drum c0- acting with fixed contacts, an operating handle for said drum, and a manually-movable spring-pressed pawl in said handle which oo-acts with a notched ring, the surfaces between some of the notches of said ring forming ratchet teeth over which the pawl cannot be raised to allow backward movement ofthe controller.

9. The combination with a controller having predetermined starting and running positions, of an operating handle for said controller, and a sprin -pressed pawl in said handle cooperating with a fixed notched plate to limit the movement of said controller to a single direction of rotation from its running position.

10. The combination with a controller which has predetermined off, starting and running positions, of an operating handle for said controller, and a manuallymovable spring-pressed aWl in said handle which co acts With'a. ed notchedV plate to limit the movement of said controller to one direction from the olf and running positions While allowing an indefinitely progressive movenie it in said direction.

11. The combination with a controller which has predetermined off, startin and running positions, of an operating handle for said controller, and a manuallymovable spring-pressed paWl in said handle which-co-acts with a fixed notched plate to limit the inovement of said controller to one direction from the off and "running positions while allowin an indefinitely progressive movement in movement in either direction from the other positions.

12. The combination with a controller which has predetermined off, starting and running positions, of an operating handle for said controller, and a manually movable spring-pressed pawl in said handle which co-acts witha fixed notched plate to limit the movement of said controller to one direction from the "06 and running ositions While allowin movement in cit er direction from' the starting position or positions. f 13. In a controller, a rotatable drum, and a pawl cooperating with a notched plate .to determine the controller positions, said awl being manually movable independenty of the drum, and certain of the notches of said notched plate being so formed that the pawl said direction and can be independently moved to clear only one of their sides.

14. In a controller, a rotatable drum, a spring-pressed pawl movable therewith, and a notched plate with which said pawl coo crates, sai pawl being manually movable independently of the 'ontroller, and certain of the notches oi' said notched lates havin one side only of such height t at the paw can be raised to clear it While the other notc es have both sides of such height.

15. In a controller, a rotatable drum, an operating handle therefor, and a springpressed awl movable with said drum, and coo erating with a fixed )late having ratchet teet for preventing bac ward movement of the controller from certain positions.

16. In a controller, a rotatable drum, operating means therefor, and a pawl cooperating with a notched plate to prevent backward movement of the controller from certain positions, said pawl being manually movable independently of the drum.

17. The combination with a controller having olf, starting and runnin positions, of a springressed pawl manually movable independent y of the controller and cooperating with a notched rin to prevent movement of the controller directly from the running to a startin position.

18. The combination Wit a controller having oil starting and running positions, of a spring-pressed pawl manually movable independently of the controller and cooperating with a notched ring to prevent movement of the controller directly from the off to the running position.

19. The combination with a controller having oli, starting and running positions, of a springressed pawl manual movable independent y of the controller and cooperating with a notched ring to prevent movement of the controller directly from the running to a starting position,or from the oil to the running position.

20. The combination with a controller having off, starting and runnin positions, of a springressed pawl manna ly movable independent y of the controller and coo erating with a notched ring to prevent bac Ward movement of the controller from its of" position.

21. The combination with a controller having off, starting and running positions, of a springressed pawl manna ly movable independent coperatingwith a notched ring to prevent y of the controller and backward movement of the controller from the running position.

22. In combination, a controller having off, starting" and running positions, and a spring-pressed pawl manually movable independently of the controller and cooperating with a notched ring to pre\ ent backward movement of the controller from the oil or running position.

23. A starter for electric motors comprising {ixed and movable contacts, the latter having oil, starting, and running positions, a pawl cooperating with a notched plate to accentuate the positions of the starter, and means for moving the awl independently of the controller to al ow fori Ward movement of the controller from 'any position and backward movement thereoi` rom a starting position only.

24. In a controller, a rotatable drum, an operating handle therefor, and a awl on said handle cooperating with a fixe ratchet plate to prevent backward movement of the controller from certain positions.

25. In a controller, a rotatable drum, a pawl and ratchet cooperating to limit the movement of said drum from certain posi tions to one direction of rotation, and means for moving said pawl independently of the drum.

26. In a controller, the combination of a stationary notched ring a handle, and means mounted on the han le to interrupt the movement of the handle at (predetermined oints on the notched rin an to allow only limited movement of the andle in a reverse direction.

27. In a controller, the combination oi a notched ring, a handle, and means mounted on the hand e to interrupt the forward movement and to prevent a reverse movement of the handle at predetermined points on the notched ring.

28. In acontroller the combination off' a notched ring, a handle, and a latch engaging with the notched ring to 0 ment of the handle in one direction and to limit movements of the handle in the other direction at predetermined points on the notched ring.

In testimony whereof I affix my signature, in the presence of two witnesses.

'HERBERT w. cirsNEr.

Witnesses:

Giro. B. SonLnY,

FRED J. KrNsiiir.

iff

interrupt the move 

